list of data saving in database using hibernate java

Question

I have 3 entities named Stock,StockHistory and StockOpenClose. And there is common column stock_id in each entity. My problem is that, I have to save list of data into each.

   for (Stock stok : stockList) {
                    session.saveOrUpdate(stok);
                    session.flush();

                    for (StockOpenAndClose openStk : stockOpenCloseList) {
                        if (stockOpenCloseList != null) {
                            openStk.setStock_id(stok.getStock_id());
                            session.save(openStk);
                            session.flush();
                        }
                    }
                    for (StockHistory stkHis : stkHisList) {
                        stkHis.setStock_id(stok.getStock_id());
                        session.saveOrUpdate(stkHis);
                        session.flush();
                    }
}

I am saving like this and data are saving.And I know this is wrong. Because stock_id will be same according to the for each loop iteration. I want get the corresponding stock_id in both StockHistory , StockOpenClose entities. How can I do that??Can anyone correct me?

Answer 1

did you mean like this?

for (int i = 0; i < stockList.size(); i++) {
  Stock stok = stockList.get(i);
  StockOpenAndClose openStk = stockOpenCloseList.get(i);
  StockHistory stkHis = stkHisList.get(i);
  session.saveOrUpdate(stok);
  session.flush();

  openStk.setStock_id(stok.getStock_id());
  session.save(openStk);

  stkHis.setStock_id(stok.getStock_id());
  session.saveOrUpdate(stkHis);
  session.flush();
}

but it will be better and simpler if you learn about "hibernate cascade" here some example